I've heard of so called "iDoping" software before, which uses infrasound and ultrasound audio spectrums to purportedly induce altered states of consciousness, although theres little research on the subject. What studies there are do show altered states of neural activity and subconcious emotional reactions to low and high frequency audio, such effects may help promote Placebo or Psychosomatic effects in some subjects to help in altering states of consciousness. Although it should go without saying that messing with such frequencies can be quite dangerous.
I'd classify it as a new form of narcotic and stay away from it, although it could be interesting to see additional research on the subject.
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